/*
 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 */

package javax.swing.plaf.synth;


import javax.swing.*;
import javax.swing.colorchooser.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicColorChooserUI;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;


/**
 * Provides the Synth L&amp;F UI delegate for
 * {@link javax.swing.JColorChooser}.
 *
 * @author Tom Santos
 * @author Steve Wilson
 * @since 1.7
 */
public class SynthColorChooserUI extends BasicColorChooserUI implements
    PropertyChangeListener, SynthUI {

  private SynthStyle style;

  /**
   * Creates a new UI object for the given component.
   *
   * @param c component to create UI object for
   * @return the UI object
   */
  public static ComponentUI createUI(JComponent c) {
    return new SynthColorChooserUI();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected AbstractColorChooserPanel[] createDefaultChoosers() {
    SynthContext context = getContext(chooser, ENABLED);
    AbstractColorChooserPanel[] panels = (AbstractColorChooserPanel[])
        context.getStyle().get(context, "ColorChooser.panels");
    context.dispose();

    if (panels == null) {
      panels = ColorChooserComponentFactory.getDefaultChooserPanels();
    }
    return panels;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installDefaults() {
    super.installDefaults();
    updateStyle(chooser);
  }

  private void updateStyle(JComponent c) {
    SynthContext context = getContext(c, ENABLED);
    style = SynthLookAndFeel.updateStyle(context, this);
    context.dispose();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallDefaults() {
    SynthContext context = getContext(chooser, ENABLED);

    style.uninstallDefaults(context);
    context.dispose();
    style = null;
    super.uninstallDefaults();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installListeners() {
    super.installListeners();
    chooser.addPropertyChangeListener(this);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallListeners() {
    chooser.removePropertyChangeListener(this);
    super.uninstallListeners();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public SynthContext getContext(JComponent c) {
    return getContext(c, getComponentState(c));
  }

  private SynthContext getContext(JComponent c, int state) {
    return SynthContext.getContext(c, style, state);
  }

  private int getComponentState(JComponent c) {
    return SynthLookAndFeel.getComponentState(c);
  }

  /**
   * Notifies this UI delegate to repaint the specified component.
   * This method paints the component background, then calls
   * the {@link #paint(SynthContext, Graphics)} method.
   *
   * <p>In general, this method does not need to be overridden by subclasses.
   * All Look and Feel rendering code should reside in the {@code paint} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void update(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    SynthLookAndFeel.update(context, g);
    context.getPainter().paintColorChooserBackground(context, g, 0, 0,
        c.getWidth(), c.getHeight());
    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component according to the Look and Feel.
   * <p>This method is not used by Synth Look and Feel.
   * Painting is handled by the {@link #paint(SynthContext, Graphics)} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void paint(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component.
   * This implementation does not perform any actions.
   *
   * @param context context for the component being painted
   * @param g the {@code Graphics} object used for painting
   * @see #update(Graphics, JComponent)
   */
  protected void paint(SynthContext context, Graphics g) {
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void paintBorder(SynthContext context, Graphics g, int x,
      int y, int w, int h) {
    context.getPainter().paintColorChooserBorder(context, g, x, y, w, h);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void propertyChange(PropertyChangeEvent e) {
    if (SynthLookAndFeel.shouldUpdateStyle(e)) {
      updateStyle((JColorChooser) e.getSource());
    }
  }
}
